/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.wicket.pageStore.memory;


/**
 * An eviction strategy that decides whether the in-memory data structure used as page store should
 * be compacted
 */
public interface IDataStoreEvictionStrategy
{

	/**
	 * Called after each {@link org.apache.wicket.pageStore.IDataStore#storeData(String, int, byte[])} call.
	 * 
	 * @param pageTable
	 *            the in-memory data store with <strong>all</strong> pages
	 */
	void evict(PageTable pageTable);
}
